Meh, he's underappreciated as a heel. Most heels are over the top, and I don't know that I've ever even heard Islam swear or raise his voice, he's just perfectly calm and dismissive, and it makes the haters apoplectic to the point they will completely humiliate themselves.
They all kind of know that he'd most likely batter Leon Scott and probably sling him down a few times and choke him to take the WW title, so they have to twist themselves into pretzels to come up with ways to convince themselves he shouldn't get the fight and hope some 5-1 underdog can pull off a fluke punch or something in the meantime, which isn't going to happen either. FFS, the common suggestion now is that he should have to give up the WW title and start from the bottom at WW. Like WTF? What other champ in the company's history has had to give up their title just to go fight random contenders in another division?
Jones got the same thing for at least 5 years as champ, and I was one of people trying to find ways to discredit his wins, but at a certain point you kind of have to accept that he's just the best and the fluke you're waiting for probably isn't going to happen. It's horse shit that he's holding the HW title hostage now, but his legacy is already cemented and the UFC are just giving him an easy send off for stepping in to bury Ngannou leaving.